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<h1>TeX notation</h1>
<p data-math-typeset="true">
When \(a \ne 0\), there are two solutions to \(ax^2 + bx + c = 0\) and they are
$$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$
</p>
<h1>AsciiMath notation</h1>
<p data-math-typeset="true">
When `a != 0`, there are two solutions to `ax^2 + bx + c = 0` and they are
</p>
<p data-math-typeset="true" style="text-align:center">
`x = (-b +- sqrt(b^2-4ac))/(2a) .`
</p>
<h1>MathML notation</h1>
<p>
When
<math xmlns="http://www.w3.org/1998/Math/MathML">
  <mi>a</mi><mo>&#x2260;</mo><mn>0</mn>
</math>,
there are two solutions to
<math xmlns="http://www.w3.org/1998/Math/MathML">
  <mi>a</mi><msup><mi>x</mi><mn>2</mn></msup>
  <mo>+</mo> <mi>b</mi><mi>x</mi>
  <mo>+</mo> <mi>c</mi> <mo>=</mo> <mn>0</mn>
</math>
and they are
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <mi>x</mi> <mo>=</mo>
  <mrow>
    <mfrac>
      <mrow>
        <mo>&#x2212;</mo>
        <mi>b</mi>
        <mo>&#x00B1;</mo>
        <msqrt>
          <msup><mi>b</mi><mn>2</mn></msup>
          <mo>&#x2212;</mo>
          <mn>4</mn><mi>a</mi><mi>c</mi>
        </msqrt>
      </mrow>
      <mrow> <mn>2</mn><mi>a</mi> </mrow>
    </mfrac>
  </mrow>
  <mtext>.</mtext>
</math>
</p>
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